↩ 🔵 🔵 🔵 ❪✺₀❫ High-Energy Astrophysics Portals ○ ❪✺❫ Spectroscopic Concepts ○ Spectral Fitting ○𓆪 ❪✺❫ XSPEC Concepts ○ ❪✺₃❫ Spectral Fitting Particulars ○ ❪✺₄❫ Spectral Fitting Sets ○ ❪✺_❫ Spectral Fitting Subs ○ ❪∂❫ Spectral Fitting Math ○